Morphine is my favorite, oxycodone is my 2nd favorite, methadone or fentanyl patches is 3rd. Hydromorphone is too short-lived to even make my top 5. Propoxyphene is practically useless. Kratom really didn't do anything for me either, but I've heard even heroin addicts praise it, so I guess its kind of a hit-or-miss substance. The positive and negative reviews I've read about kratom are about 50/50. When I took it, I was expecting it to be similar in strength to hydrocodone based on reviews I've read, but it didn't even touch on codeine's level in my experience (which doesn't say much for it as a painkiller). It had me convinced that they were placebo.